X = int(input())

if X > 29:
    print("Yes")
else:
    print("No") X = int(input()) X int(input()) int input() input if X > 29:
    print("Yes")
else:
    print("No") X > 29 X 29 print("Yes") print "Yes" print("No") print "No" X = int(input()) int(input()) X
X = int(input())

if X > 29:
    print("Yes")
else:
    print("No")
